Repair or design your very own audio cables with these nice and durable phono-plug connectors. This is a great plug to make your own cable with. It39s made out of durable metal with a flexible, sturdy spring for strain-relief. Just solder the connector to some wires and you have a DIY audio cable that can rival the best! This item is a 1/4 Mono Plug. It39s a pretty common size for pro-audio or monitors/headphones, and is super useful for more heavy duty connections. This plug is the mono version. We also carry a 1/4 (6.35mm) DIY Stereo Plug.